TT #67 · Parshas Tazria · Aliyah 1 · Passuk 2
English: When a person has on the skin of the body a swelling, a rash, or a discoloration, and it develops into a scaly affection on the skin of the body, it shall be reported to Aaron the priest or to one of his sons, the priests.
Chabad.org — Chumash, English translation + Rashi for Vayikra 13:2
Torah Temimah cites Shevuos 6b for this stage in the definition of the skin-affliction appearances.
E-Daf — Shevuos 6b · Shas.org · Sefaria — source text and translation
English: From where do we know that baheres is an intense white? Abaye says Scripture states, “If the baheres is white”: it alone is white, and no other appearance is as white.
Definition by scriptural comparison
The Gemara derives the exceptional whiteness of baheres from the verse's wording, distinguishing it from the other appearances.